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Question & Answer Forum

Next time you have a doubt while studying, you know where to go. By simply posting your questions on Question & Answer Forum, you can have them answered by academic experts. You can also find related videos and explanations for better understanding.

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Agam answered 1 year(s) , 10 month(s) ago

Edit the following passage

Answer.

    WRONG                          CORRECT

Have                                   Has
Were                                  is
since                        ...

  • 12 Answers
  • 79 Likes
  • 236647 Views
Priyanshu answered 11 month(s) , 3 day(s) ago

Speech of 1 minute on "hobbies and interest". very urgent

Note: This question is to be answered on the basis of your own understanding, experience and thoughts. It is strongly recommended that you prepare the solution on your own. However, one sample soluti

...

Asked by Siri

Sep 28

  • 20 Answers
  • 52 Likes
  • 210439 Views
Priyanshu answered 1 year(s) , 7 month(s) ago

The ratio of the sum of n terms of two A.P.s is (7n+1):(4n+27).

Answer. Given ratio of sum of n terms of two AP’s = (7n+1):(4n+27)
Let’s consider the ratio these two AP’s mth terms as am : a’m →(2)
Recall the nth term of AP formula, an = a + (n – 1)d...

Asked by Venkatesh

Nov 13

  • 5 Answers
  • 38 Likes
  • 187524 Views
Syeda answered 1 year(s) ago

Show that one and only one out of n,n+2,n+4 is divisible by 3, where n is any positive integer.

Answer.

We applied Euclid Division algorithm on n and 3.
a = bq +r  on putting a = n and b = 3
n = 3q +r  , 0 i.e n = 3q   -------- (1),n = 3q +1 --------- (2), n = 3...

Asked by Hyadarani

Apr 15

  • 2 Answers
  • 32 Likes
  • 167002 Views
Priyanshu answered 1 year(s) , 7 month(s) ago

What are the values of log from 1 to 10?

Answer.

log 1 = 0
log 2 = 0.3010
log 3 = 0.4771
log 4 = 0.6020
log 5 = 0.6989
log 6 = 0.7781
log 7 = 0.8450
log 8 = 0.9030
log 9 = 0.9542 <...

Asked by Yash

Jan 18

  • 3 Answers
  • 12 Likes
  • 140089 Views
Syeda answered 1 year(s) ago

Find the value of tan 15 degrees

Answer.

Let  tan(15°) = tan(45°-30°)

We know that tan(A - B) = (tanA - tanB) /(1 + tan A tan B)

⇒tan(45°-30°) = (tan45°- tan30°)/(1+tan45°tan30°)

= {1-

...

Asked by Chundi

Apr 20

  • 3 Answers
  • 12 Likes
  • 118210 Views
Priyanshu answered 1 year(s) , 10 month(s) ago

what is the derivation of mirror formula of concave and convex mirror?

Consider the shown figure where O is a point object and I is corresponding image.
CB is normal to the mirror at B.
By laws of reflection,

For small aperture...

Asked by Chayanika

Nov 16

  • 6 Answers
  • 29 Likes
  • 116009 Views
Syeda answered 1 year(s) ago

An electric bulb is rated 220V and 100W. when it is operated on 110V, what will be the power consumed?

P = V 2/R  
If V = 220 V we have

100 W = 220 2/R
R = 220 2/100 Ω = 484 Ω. This is the resistance of the bulb.

When V = 110 V,...

Asked by Sabu

Jun 24

  • 2 Answers
  • 6 Likes
  • 113537 Views
Syeda answered 1 year(s) ago

Find the greatest 6 digits number exactly divisible by 24, 15,and 36.

We will find out the LCM of 24,15 and 36 is 360.

Now, greatest 6-digit number is 999999.

Now, We will divide this number by LCM of 24,15 and 36, we will get,

999999/360 will get remai

...

Asked by BAISHALI

Apr 20

  • 2 Answers
  • 7 Likes
  • 108822 Views
Syeda answered 1 year(s) ago

If the polynomial X4- 6X3+16X2-25X+10 is divided by X2-2X+k


Given that the remainder is (x + a)
⇒ (4k – 25 + 16 – 2k)x + [10 – k(8 – k) ] = x + a  
⇒ (2k – 9)x + [10 – 8k + k 2 ] = x + a
On comparing both the sides, we get...

Asked by Krishna

Aug 20

  • 3 Answers
  • 10 Likes
  • 107121 Views
Priyanshu answered 1 year(s) , 7 month(s) ago

Explain the mechanism of opening and closing of stomata.

Sol:
Stomata are small pores present in the epidermal cells of leaves in plants. Stomata are open during the day and close during night.Stomata take in carbon dioxide required for the photosynthetic act...

Asked by Devansh

Mar 22

  • 3 Answers
  • 7 Likes
  • 104569 Views
Syeda answered 1 year(s) ago

A plane left 30 min later than the scheduled time and in order to reach the destination 1500km away in time it has to increase the speed by 250km/h from the usual speed. find its usual speed

Sol:
Let the usual time taken by the aeroplane = x km/hr
Distance to the destination = 1500 km
Case (i)
Speed = Distance / Time = (1500 / x) Hrs
 
Case (iI)...

Asked by P duraisami

Apr 28

  • 2 Answers
  • 6 Likes
  • 100681 Views
Syeda answered 1 year(s) , 11 month(s) ago

What is the difference between horizontal and vertical power sharing?

The horizontal power sharing

Power is shared among different organs of government such as the legislature, executive and judiciary.

Organs of the government are placed at the same level to ex

...

Asked by Ramesh

Apr 18

  • 2 Answers
  • 7 Likes
  • 96633 Views
Syeda answered 1 year(s) ago

If mth term of an A.P is 1/n and the nth term is 1/m

Answer.


  • SME Approved

Asked by Lavanya

Nov 24

  • 2 Answers
  • 9 Likes
  • 96458 Views
Yogita answered 1 year(s) , 3 month(s) ago

Prove that 9AD2 = 7AB2

In this solution triangle ABC and ACE is taken in place of ABC, ABE should be taken.

Asked by Pranav

Sep 1

  • 3 Answers
  • 13 Likes
  • 94234 Views
Agam answered 1 year(s) , 10 month(s) ago

What is nutrition? Explain different types of nutrition.

Answer.

Nutrition is the process by which an organism procures its nourishment, the supply of nutrients required by its body and cells to stay alive. Nutrition is of two types namely, autotrophi...

Asked by Saimeghana

Feb 18

  • 4 Answers
  • 8 Likes
  • 92563 Views
Anand answered 1 year(s) , 4 month(s) ago

What is the difference between a virtual image and a real image?

The following are the main differences between a real image and virtual image. 

1.A real image can be caught on a screen whereas a virtual image cannot be caught on a screen.
2. A real i...

Asked by Nidhi

Dec 3

  • 15 Answers
  • 23 Likes
  • 91190 Views
Syeda answered 1 year(s) ago

Find the largest number which divide 615 and 963 leaving remainder 6 in each case.

To find the largest number which divides 615 and 963 leaving remainder 6 in each case i.e. HCF.

Consider HCF be x.

In order to make 615 and 963 completely divisible by x, we need to deduct th

...

Asked by Pragasam

May 22

  • 2 Answers
  • 6 Likes
  • 87695 Views
Syeda answered 1 year(s) ago

Key Features of Federalism

Answer.

  There are two or more levels  of government.

1.  Different tiers of government govern the same citizens, but each tier has its own jurisdiction in specific matters of legislation,

...

Asked by Arun

Aug 19

  • 2 Answers
  • 5 Likes
  • 87031 Views
Syeda answered 1 year(s) ago

Prove that the product of three consecutive positive integer is divisible by 6.

Sol;
Let us three consecutive  integers be, n, n + 1 and n + 2.
Whenever a number is divided by 3 the remainder obtained is either 0 or 1 or 2.
let n = 3p or 3p + 1 or 3p + 2, where p is so...

Asked by Sparsh

Apr 27

  • 2 Answers
  • 6 Likes
  • 85380 Views
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